Gas-saving or pressure-equalizing valve.



.N0. s5s,442. 'PATENTED JULY 2, 1907.-

I 7 J. G GAS SAVING 0R PRBSSUR UALIZING VALVE.

PPPPPPPPPPPPPPPPPPP 6, 1905.

OW W Elli! UNITED STATES PATENT OFFICE.

JAMES COWIE, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TONATIONAL GAS SAVING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OFILLINOIS.

GAS-SAVING OR PRESSURE-EQUALIZING VALVE.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed Novembe 6, 1905. Serial No. 286.016.

To all whom it may concern:

Be it known that I, JAMEs CowIE, a subject of the King of England, and aresident of the city of Chicago, county of Cook, and State of Illinois,have invented certain new and useful Improvements in Gas-Saving orPressure-Equalizing Valves; and I do hereby declare that the followingis a full, clear, and exact description of the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

This invention relates to improvements in equalizing valves of thatclass adapted to be connected'in the sup ply pipe for illumination orother gas to regulate the pressure and consequently the delivery at theoutlet.

Heretofore in devices of the class described multiplicity of parts haveusually been employed which must co-operate to produce the desiredresult and in many instances very trifling defects or imperfections orvariation in the adjustment have been sufficient to prevent thesuccessful operation of the device. Furthermore owing to the many partsemployed such valves have usually been quite expensive.

The object of this invention is to provide a cheap, simple, durable andpositively operating gas saving or regulating valve of very few partsand those so simple and inexpensive in construction as to be quicklyassembled and adjusted to operate at any desired pressure.

The invention consists in the matters hereinafter described and morefully pointed out and defined in the appended claims. I

In the drawings: Figure 1 is a longitudinal vertical section of a deviceembodying my invention. Fig. 2 is a section taken on line 22 of Fig. 1.Fig. 3 is a section taken 011 line 3-3 of Fig. 1.

As shown in said drawings: A indicates a casing of cast metal or anysuitable material having in its'top a relatively large pressure chambera surrounded as shown at its top with an annular channel (1 adapted tocontain mercury or some other suitable non-freezing and non-volatileliquid. The outer walls of said casing extend upwardly above saidchamber and said channel affording a peripheral flange a upon which isfitted a chambered cap A which is engaged thereon by a set screw (1 Atopposite ends of said casing and at approximately the middle of the sameis an internally threaded outlet aperture a, and an internally threadedinlet aperture a and as shown in the bottom of the casing 'is provided adrainage chamber a in open communication with the outlet pipe or andfromthe bottom of which opens an internally threaded aperture (1corresponding with the outlet aperture and adapted for connection eitherwith a drainage pipe or closed normally with a plug a as preferred. I

As shown the interior of the casing is cored to afford opencommunication between the pressure chamber and the outlet pipe andbetween the drainage chamber and the outlet pipe or aperture a and acentral seat is provided between the pressure chamber and the drainagechamber in which fits the inlet casing B, which is thus wholly inclosedin the casing A and apertured in its side to communicate with the inletaperture a Apertures are provided in its top and bottom wall as shown inFigs. 1 and 2, which as shown are circular and the relatively sharpedges of which serve as valve seats.

A float C forms the top of the pressure chamber and comprisesa sheet ofmetal pressed to afford a closed head and a peripheral downturned flangec, which fits into the annular channel a, and is of a length to extendto the bottom of the same.

Depending centrally through the pressure chamber and through the inletcasing B, is a valve ste n C threaded at its lower end. Adjustablycarried on said stem within the casing B and positioned to close theaperture in the top thereof is a valve closure 0 and below said casingand positioned to close the aperture at the bottom wall thereof is avalve closure 0 both of said closures are conical or tapered in form andare adjustably secured on said stem by means of nuts one engaging aboveand one below each of said closures. As shown also a strap of metal 0 issecured on the lower wall of said inlet casing and acts as a guide forthe stem' 0 which extends through the same. On the top of the float Care one or more weights C sufiEicient to hold the float at its lowestposition with the valves open when the pressure in the pressure chamberis below that for which the valve is set. Said weights may be of anydesired shape or -material as shown however the same are leaden or otherdisks which fit over the upwardly extending end of the stem and arethereby held in place.

The operation is as follows: The float is adjusted by means of saidweights C to yield to a pressure greater than that desired to bemaintained in the delivery end or at the fixture. Should inlet pressurenot exceed said desired pressure there will of course be no movement inthe valve and the gas will flow through the casing C to the outlet (1Should the main pressure increase to a point greater than that for whichthe valve is set the float is lifted closing or partly closing thevalves until the pressure is again approximately normal. The valveclosures c c being of equal size afford'together a balanced valve sothat the pressure in the inlet chamber is always equalized thereon andthe opening and closing of the same is thereby controlled wholly by thepressure acting on' the float. Any water, tar or other liquids or vaporscontained in the gas will be condensed and will flow into the drainagechamber and may be readily drained from the regulator by removing theplug a V Obviously the casing and the valves therein may be varied inform and many other details of construction may be varied Withoutdeparting from the principles of my invention.

I claim as my invention:

1. In a device of the class described the combination with a casinghaving an upper and lower chamber and a restricted passage connectingthe same, oppositely disposed alined inlet and outlet ports opening intothe casing, opposite said passage, a seat in said casing at the lowerend of the passage, a removable inner casing seated in said passage on aplane with the inlet and outlet ports and opening into the inlet port,ports in the inner easing opening one into the upper and oneto the lowerchamber, a stem extending through said ports, valves on said stems onefor each of said ports, an annular channel in the top of the casing anda float having downturned sealed edges and rigidly engaged to the stemadapted to regulate the supply.

2. In a device of the class described the combination with a casing,having inlet and outlet orifices, and said casing having a narrowpassage near the middle thereof, a seat near the lower end of saidpassage, an inner casing removably engaged in the casing and seating onsaid sent affording a partition to divide the first mentioned easinginto a plurality of chambers and affording a chamber intermediate saidchambers, ports aifording communication between the intermediate chamberand the first named chambers, a stem projecting thercthrough, closureson said stem, one for each port, an annular chamber at the top of thefirst named casing, a float having its edge sealed therein and dividingthe upper chamber into a plurality of noncommunicating chambers, aweight engaged to the stem, and a removable guide engaged to the innercasing to guide said closures to seat on said ports.

In testimony whereof I have hereunto subscribed my name in the presenceof two subscribing witnesses.

' JAMES COWIE. Witnesses:

\V. W. WI'rHnNBuny, WM. C. SMITH.

